Formulating hypotheses

non-directional

directional or non-directional? mean for the Tx group will be significantly different form the mean for the control group

directional

directional or nondirectional? mean for the Tx group will be significantly greater than mean for the control group; only 1 way interested in extreme result (higher)

patient; intervention; comparison; outcome

PICO stands for

direction; non-direction

alternative hypotheses can be (2)

hypothesis

educated thought as to what the outcome of the study will show; proposed relationship between 2 or more variables; guides the design of your study and what stats you will choose

state

step 1 of hypothesis testing: __ the hypothesis (null and alternative)

alternative

type of hypothesis that is what you believe to be the case; statement of expected results

null

type of hypothesis usually stated in terms of no relationship between the variables or no difference between groups

non-directional

type of hypothesis; researcher just says the groups will be different - no further specification

directional

type of hypothesis; researcher specifies the direction in which the 2 groups will differ

end

we want our group's mean to fall in an extreme __ of the normal curve